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Jimmy looked dapper in a suit and tie, with his black hair immaculately styled as ever.

The Eight Out of Ten Cats star clapped politely and chatted to his adult pals on his right.

A family affair: Romeo was joined by his nan Sandra

Keeping their eyes on the ball: Romeo and Sandra were transfixed by the ball

Also in attendance was Hollywood A-lister Kevin Spacey, who wore a grey suit jacket over a burgundy top as well as a pair of black-framed specs and a tweed flat cap which he wore back to front.

Romeo was seen on Thursday sitting beside dad David as the pair cheered on Jamie Murray and Bruno Soares in their doubles match against Ivan Dodig and Marcelo Melo.

The youngster's mum Victoria recently took to Instagram to praise the teenager for his sporting talents.

Funnyman: Jimmy looked dapper in a suit and tie, with his black hair immaculately styled as ever

Famous faces: Also in attendance was Hollywood A-lister Kevin Spacey

Hollywood great: The star wore a grey suit jacket over a burgundy top as well as a pair of black-framed specs and a tweed flat cap which he wore back to front

Sharing a sweet snap of him serving up a ball on the court, she wrote: 'Romeo is a true sportsman X Game set and match! X vb.'

Last year, tennis coach John Johnson claimed Romeo would be one to watch in the tennis world, as he revealed he had been chatting with the star's famous family about his potential.

He told the Daily Star: 'He has a lot of talent and very good hand-eye coordination. I'm going to have a meeting with his mother about it to reinforce that because I'm not sure his parents realise how good he is.

'Romeo really loves tennis. He is really into it and very talented. Romeo has a natural swing and is very enthusiastic, he just loves it.

'He kept telling me and I could see how focused he was.He is very energetic, very quick and strong.'

Father and son: Romeo was seen on Thursday sitting beside dad David as the pair cheered on Jamie Murray and Bruno Soares in their doubles match against Ivan Dodig and Marcelo Melo